I want to hook up a 3x4 switch so I can run three recievers off my c-band dish. Ihave a dual c-band lnbf from SatAv to hook to the switch. Here is the part I am having a hard time figuring out. The dsr922 and the fortec mercury in the den are easy. The dsr410 in the living room is also were my OTA HD TV is. I only have one drop to that room and I want to combine the OTA and the 410 into one cable using the 3x4 switch.Do I use diplexers after the switch and to the TV, or do I just use one diplexer at the TV since the signal is already coming through the 3x4?